DTC C1AB4: Open in Outer Mirror Indicator (Master) [06/2018 - ]: Procedure

1. Turn the engine switch off.
2. Turn the engine switch on (IG).
3. Recheck for DTCs and check if the same DTC is output again.

   Body Electrical > Blind Spot Monitor Master > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

Result: 

NG 

See step  2

1. Disconnect the R4 blind spot monitor sensor RH connector.
2. Disconnect the J6 outer mirror control ECU assembly RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   R4-4 (OMIR) - J6-13 (BDSR)	Always	Below 1 Ω
   J6-7 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Disconnect the z19 outer rear view mirror assembly RH connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Outer Mirror Control ECU Assembly RH)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J6-13 (BDSR) - z19-8 (BSM+)	Always	Below 1 Ω
   J6-7 (GND) - z19-12 (GND)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH. Refer to  REMOVAL [06/2018 - ] 

Result: 

OK 

See step  4

1. Disconnect the IND1 outer mirror RH connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z19-8 (BSM+) - IND1-1 (+)	Always	Below 1 Ω
   z19-12 (GND) - IND1-2 (-)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH. Refer to  REMOVAL [06/2018 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

OK 

See step  5

1. Remove the outer mirror RH.

   Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - ]

2. Inspect the outer rear view mirror indicator RH on the outer mirror RH.

   Refer to INSPECTION [06/2018 - 08/2021] , or refer to INSPECTION [08/2021 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE BLIND SPOT MONITOR SENSOR RH. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

NG 

REPLACE OUTER MIRROR RH. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - ]